1 star deduction wg. Size d. In-Ear "buttons" and operating instructions in English

1. There is unfortunately only one size for the in-ear parts. For small ears not so great suitable. But still acceptable.
2. Manual only in English (and irgenwas Asian) and written very small. Overall, just not consumer-friendly.
WHY: A star deduction for points 1 and 2. FIG.

3. The buttons are easy to handle. One only has to with the colored flashing LEDs deal, or what it means each color. Makes some effort, but with time it can be.
4. Sound is very good.
5. One can therefore quite passable calls. So an all-round device.

Summary: If the points 1 and 2 do not bother, I can definitely recommend the headphones.